主权项 |
1. A system comprising:
an evaporator; a water reservoir in fluid communication with the evaporator and directly upstream of the evaporator for direct discharge of a fluid to the evaporator; and a first steam drum downstream of the evaporator, in fluid communication with the evaporator for a fluid supply therefrom, and upstream of the water reservoir in fluid communication with the water reservoir for a fluid supply thereto, with the water reservoir operative to supply feedwater to the evaporator while maintaining a predetermined water level in the first steam drum. |